Oil burner with preheating and igniting means



March 5 H. J. LE cLERc El AL 5 3 OIL BURNER WITH PREHEATING AND IGNITINGMEANS Filed Nov. 19, 1947 2 Sheets-Sheet l Fig.

Henry J. LeC/erc Phil/1a J. LeC/erc INVENTORS D |||l| ||||l 0D 0 O O 0 DD D 0 o 0 O O O D O o O o 0 0 0M0 0 0 M0 0 0 O M O 000 0 0 0 0 0 0 March21, 1950 H, J LE c c Er AL 2,501,396

OIL BURNER WITH FREHEATING AND IGNITING MEANS Filed Nov. 19, 1947 2Sheets-Sheet 2 I n wen to r5 Henry J. LeC/erc Philip J. Le Clerc By M 5Patented Mar. 21, 1950 OIL BURNER WITH PREHEATING AND IGN ITIN G MEAN SHenry J. Le Clerc, Cambridge, and Philip J. Le Clerc, West Medford,Mass.

Application November 19, 1947, Serial No. 787,010

1 Claim. 1

This invention relates to new and useful improvements in oil burners andthe primary object of the present invention is to provide a wicklessautomatic lighting oil burner.

Another important object of the present ininvention is to provide an oilburner including a heating unit and an igniter, and embodying novel andimproved means for simultaneously energizing the heating unit and theigniter.

A further object of the present invention is to provide an oil burnerincluding novel and improved burner sleeves so designed as to direct aflow of heat through the same with the maximum efficiency.

A still further aim of the present invention is to provide an oil burnerthat is simple and practical in construction, strong and reliable inuse, neat and attractive in appearance, small and compact in structure,relatively inexpensive to manufacture, and otherwise Well adapted forthe purposes for which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure 1 is a diagrammatic view showing the present oil burner appliedto a source of fuel, and with parts of the burner shown in dotted lines;

Figure 2 is a similar view of Figure 1 and with parts of the burnerbroken away and shown in section;

Figure 3 is a transverse horizontal sectional view taken substantiallyon the plane of section line 33 of Figure 2;

Figure 4 is an enlarged fragmentary vertical sectional view takensubstantially on the plane of section line 4-4 of Figure 5;

Figure 5 is an elevational view of the burner sleeves and fuel panspaced relative thereto, and with parts of the sleeves and fuel panbroken away and shown in section; and,

Figure 6 is a transverse horizontal sectional view taken substantiallyon the plane of section line 66 of Figure 5.

Referring now to the drawings in detail, wherein for the purpose ofillustration, there is disclosed a preferred embodiment of the presentinvention, the numeral Ill represents an annular heating unit having anupstanding flanged portion I2. Annular channels I4 and I6 are providedin this heating unit Ill and receive heating elements or coils I8 and 20that are con- 2 nected to each other at one end. The free ends of thesecoils I8 and 20 are connected to depending terminals or posts 22 and 24that extend beneath the unit I0.

An arcuate hollow rib 26, integrally formed at the bottom wall of theheating unit I0, is disposed between the channels I4 and Hi. The ends ofthe rib 26 are in spaced opposed relation to form a passage betweenthe'channels I4 and I 6. The rib 26 is provided with a plurality ofcircumferentially spaced openings 25 that register withcircumferentially spaced openings 21 provided in an arcuate hollowupstanding rib 28 forming part of the bottom wall of an annular oil pan30.

The oil pan 3!] is supported on the heating unit I0 and the annularflange portion I2 embraces the oil pan 3!) as shown best in Figure 2 ofthe drawings.

The oil pan 30 is provided with a central flanged portion 32 having anannular inner shoulder 34 that receives the lower edge of an innerperforated sleeve 36, an inner annular oil receiving channel 38 thatreceives the lower edge of an intermediate perforated sleeve 40, anouter annular oil receiving channel 42 that receives the lower edge of afurther perforated intermediate sleeve 44, and an annular outer shoulder46 adjacent its outer annular flange 48 that supports the lower edge ofan outer perforated sleeve 50.

Fixedly positioned in the bottom wall 52 of the oil pan 30 and in theinterrupted portion 53 between the spaced ends of the channel 28, is acarbon trapping leg 54 having an inlet nipple 56 that is connected to aconduit 58 leading from a conventional electric time clock and oil valvemechanism 50. The blind bore or chamber 62 provided in the carbontrapping leg 54 communicates with the oil receiving channels 38 and 42,so that oil entering the chamber 62 from the conduit 58 will enter theoil pan.

Removably carried by the outer sleeve 50 is an electric igniter 64 thatis connected to one terminal 66 of the mechanism by an insulated wireline 18 leading from the sump or supply pan 80 of an elevated oil tank8.2, and the plug 84 carried by the electric cord 86 of the mechanism 60is inserted into a usual electric outlet. The electric time clock inmechanism 60 will be actuated to simultaneously energize the coils i8and 20 and the igniter 64. The valve in the mechanism 60 will remainopen at all times to permit a flow of fuel into the oil receivingchannels 38 and 42. The heating coils l8 and 20 and igniter 64 willremain energized for a predetermined period of time to preheat the oilin the channels 38 and 42 so that vapor formed from the oil in the oilpan will be ignited. Once the oil in the pan has been ignited, the timeclock in mechanism 60 will shut off the current, as the heat prevalentin the sleeves and the oil pan will be sufiiciently heated toefficiently ignite the oil without having to retain the heating coilsenergized after the initial operation.

Having described the invention what is claimed as new is:

An oil burner comprising an annular heating unit having inner and outerannular walls, an arcuate rib provided between the inner and outer wallsof said unit and dividing the same into inner and outer channels, saidrib having a plurality of circumferentially spaced openings, the ends ofsaid arcuate rib being in spaced opposed relation to form a passagebetween said channels, a resistance heating coil having a portionpositioned in said inner channel and having one end anchored in saidinner channel, said heating coil extending through said passage andhaving a portion positioned in said outer channel,

the other end of said heating coil being anchored in said outer channel,an annular oil pan having a concentric arcuate and hollow upstandingrib, the hollow rib of said oil pan having a pinrality ofcircumferentially spaced openings registering with the openings in saidfirst named rib, a carbon trapping leg carried by the oil pan andreceived in the passagebetween the ends of said first named arcuate rib,an inlet conduit connected to said carbon leg, an igniter carried bysaid oil pan overlying said carbon leg, a

plurality of perforated, concentric sleeves rising from said pan, saidheating unit and said pan having opposed, central openings, said carbontrapping leg including a cylindrical memher having a blind borecommunicating with the REFERENCES CITED The following references are ofrecord in the file of this patent:

UNITED STATES PATENTS Date Number Name 2,056,146 Sherman Sept. 29, 19362,291,441 Avampato July 28, 1942 2,458,630 Palko Jan. 11, 1949

